Nissens 17-21-8-514-515 Automatic Transmission Oil Cooler

The Nissens 17-21-8-514-515 is a premium-grade automatic transmission oil cooler engineered to OEM standards for BMW vehicles. This essential heat exchanger maintains optimal transmission fluid temperatures, preventing overheating and ensuring smooth, reliable operation of your automatic transmission system.

Key Features:

• Constructed from high-quality aluminum for maximum durability and heat dissipation
• Pressure-impulse tested with 100,000 impulses at up to 10.0 bar for proven reliability
• Advanced turbulator design ensures efficient heat transfer and optimal cooling performance
• Product dimensions: 250mm x 160mm x 125mm (9.8" x 6.3" x 4.9")
• Nissens manufacturer part number 91480
• Direct replacement for BMW OEM part number 17218514515

Nissens brings over 100 years of thermal management expertise to this transmission oil cooler, utilizing advanced in-house testing facilities to ensure compliance with rigorous quality standards. Each unit is manufactured to match OE quality, delivering long service life and trouble-free operation. Common symptoms of a failing transmission oil cooler include transmission overheating, erratic shifting, and fluid leaks—making timely replacement critical to protecting your transmission from costly damage.